United Launch Alliance's updated diagram of the Vulcan Centaur finally reflects what many saw as a foregone conclusion: the main stage will be powered by Blue Origin's BE-4 engine.
BE-4 hotfire
AR1 illustration
A Blue Origin BE-4 engine
on display at the 34th Space Symposium. Credit: Blue Origin
A still from a video released by Blue Origin March 13 showing a recent 114-second BE-4 engine test. Credit: Blue Origin
Blue Origin’s BE-3 during acceptance testing
BE-4 hotfire
BE-4 hotfire
ASRC propellant injector
BE-4 engines
BE-4 powerpack
ULA Vulcan
BE-4 powerpack
Blue Origin founder Jeff Bezos speaks in front of his company's New Shepard suborbital vehicle on display at the 33rd Space Symposium in Colorado Springs April 5. Bezos said the company still plans to start flying people on suborbital space tourism flights by the end of 2018, although the company has yet to start selling tickets or even setting a ticket price. Development of New Shepard, he said, is informing the company's plans for an orbital launch vehicle, New Glenn, that will use the same BE-4 engines that United Launch Alliance is considering for its Vulcan rocket. Credit: Chuck Bigger for SpaceNews